And lest you say: He who built the one did not build the other. (This is not so,) for it is written (Bereshith 10:6) "And the sons of Cham (the son of Noach): Kush, Mitzrayim, Fut and Canaan": Cham, who built the one (Chevron) built the other (Tzoan). Is it conceivable that first he built the ugly and then he built the beautiful! It must be that first he built the beautiful (Chevron), and then (with its "refuse") built the ugly (Tozan)! Because (the soil of) Chevron was choicer than that of Mitzrayim, it was, therefore, built first. Now does this not follow a fortiori, viz.: If Chevron, the "refuse" of Eretz Yisrael is choicer than the choicest of Egypt, the choicest of all the (other) lands, how choice must Eretz Yisrael be!
Kingdom of Hebron
Sifrei Devarim 37:3